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Prove that 1/(tanx) + tanx = 1/sinxcosx

The key here is to realise that tanx = sinx/cosx. If we write out the left hand side of the equation in terms of sine and cosine we get: cosx/sinx + sinx/cosx These two fractions can be put over a common den...
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Answered by Hannah M. • Maths tutor
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What is data validation and data verification?

Data Validation Data validation is the process of comparing data with a set of rules to find out if data is reasonable. There are many types of data validation such as: -Format check: Checks data is in the r...
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Answered by Carlota O. • Computing tutor
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Factorising a Quadratic

Factorising a quadratic polynomial of the form, ax 2 + bx + c = 0 can be done in many depends depending on the values we have for a, b and c. Some simple polynomial could be done simply by recognition. For e...
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How do I tackle an unseen poetry question?

When it comes to unseen poetry there are many ways to approach the analysis. To begin with it is always best to read it, not once but twice , making sure to underline/note themes, imagery, symbolism and othe...
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Answered by Nishad R. • English tutor
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Describe the differences between regional and contact metamorphism.

Metamorphism is the the solid state change of minerals and textures within a pre existing rock (country rock) as a result of changing pressure/ temperature conditions. Fluids such as H2O also play a very imp...
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Answered by Ben W. • Geology tutor
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